Inconsistent Release.uploader_id values predating <commit in description>.

[ewdurbin]

This commit populated the Release.uploader_id from the Journals.submitted_by at the time of migration but did so incorrectly: 6cb8bf9

We should attempt to correct the data as best we can.

[ewdurbin]

select p.name, r.version, u.username, j.submitted_by, r.created, j.submitted_date from releases r join users u on r.uploader_id=u.id join projects p on p.id = r.project_id join journals j on (j.name=p.name and j.version=r.version) where j.action='new release';

Useful for inspection ^

[ewdurbin]

Local dev db is not a reproducer since dstufft owns all journal entries.